Day. According to Peter Stanford, the term originates from the Italian catafalco, which means scaffolding. However, the Oxford English Dictionary says...

discontinued on the 22 of May 1639. Initially it is carried in procession the Catafalco with the Dead Christ, after 5 will be the statues that depict respectively...

cipher Eighty-four views and statues of the Villa Pamphili. Four, entitled Catafalco e apparato nella ehiesa, etc. Sepulchral Monument of N. L. Plumbini, Dominicus...